LDG AT-200PROII, Operation Manual

Page: 7 / 27

PAGE 7
INSTALLATION
The AT-200ProII is intended for indoor use only; it is not water-resistant. If you use it
outdoors, (Special Event Station, for example) you must protect it from rain. The AT-200ProII is
designed for use with coax-fed antennas. If use with longwires or ladder-line-fed antennas is
desired, an external balun rated to 200 watts is required.
Place the AT-200ProII in a convenient location near the transceiver. Always turn your radio
off before plugging or unplugging anything. The radio may be damaged if cables are connected
or disconnected while the power is on.
Connect the HF antenna jack on the transceiver to the TX jack on the back of the AT-
200ProII, using a 50 ohm coax cable rated 200 watts or higher.
Connect a 50-ohm antenna feedline coax to the ANT 2 jack on the back of the AT-200ProII,
and optionally connect a second antenna feedline to the ANT 1 jack.
The AT-200ProII is designed to interface directly with many popular ICOM and Yaesu
transceivers, enabling one button tuning. In the case of ICOM radios, the optional interface cable
also powers the tuner.
For ICOM radios supporting the AH-3 or AH-4 external tuner, connect the 4-pin Molex
connector of the optional ICOM interface cable to the radio’s Tuner port. Then connect the 1/8”
stereo plug on the other end of the ICOM interface cable to the jack marked
Radio on the rear of
the AT-200ProII. Connect the coaxial DC power plug of the ICOM interface cable to the 12
VDC Power jack.
For Yaesu FT-857 and FT-897, use the optional Y-ACC cable and plug the red end marked
Radio into the transceiver’s ACC port. Plug the black end of the Y-ACC cable into the jack
marked Radio on the rear of the AT-200ProII.
Unless the AT-200ProII is being powered by the ICOM radio interface cable as above, you’ll
also need to plug in the supplied DC coaxial power cable. This cable has a 2.5x5.5mm coaxial
plug on the end. Plug the coaxial plug into the
12 VDC Power jack on the rear of the AT-
200ProII, and connect the other end to a DC power source between 11 and 16 volts DC, capable
of supplying up to 1A.
Grounding the AT-200ProII tuner will enhance its performance and safety. LDG
recommends that you connect your tuner to a suitable ground. A common ground rod connected
to buried radials is ideal, but a single ground rod can provide a serviceable ground. LDG strongly
recommends the use of a properly installed, high quality lightning arrestor on all antenna cables.